Harsh
Well-Known Member
I've had mixed results with that technique but I think it depends on the type of material you want the tape to adhere to. I recall when everyone was complaining that the VHB tape Street Guardian was supplying with their mounts was peeling off the mount in warm conditions but sticking well to the glass they recommended sanding the plastic but that didn't work at all for me. Using aftermarket 3M VHB tape I purchased elsewhere did the trick. - Plus good prep and surface cleaning.
Then again, 3M recommends abrasion as a technique to try on their Surface Prep page.
I guess if that doesn't work, then go with one of their primers or adhesion promoters but they can be pricey unless you are doing a lot of installations.
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I used sand paper on the wedges and the housings for my rear mounted Mobius cameras, after they fell off twice due to the heat. Hasn’t failed till now. Don’t know why it didn’t work for you.